USGS Scientific Investigations Report 2011–5191  - Seepage Investigations of the Clackamas River, Oregon 

Table 1. Streamflow measurement and withdrawal sites used in the estimation of streamflow gains and losses in the Clackamas River basin, Oregon. 

[Locations of sites are shown in figures 1 and 2. Abbreviations: (a) tributary enters or withdrawal from Clackamas River at specified river mile; USGS, U.S. Geological Survey; –, not applicable] 

Site number	Site name	USGS  station No.	Clackamas River mile	Water year of measurement
1	Oak Grove Fork near Government Camp—streamflow  monitoring site	14208700	–	1963–83, 2001–06
2	Oak Grove Fork above Power Plant Intake—streamflow monitoring site	14209000	–	1963–83, 1995–96, 2001–06
3	Clackamas River above Three Lynx Creek—streamflow monitoring site	14209500	47.8	1963–83, 1995–96, 2001–06
4	River Mill Dam	–	22	–
5	Clackamas River at Estacada - streamflow monitoring site	14210000	21.9	1909–2008
6	Clackamas River at Estacada (14210000)—streamflow measurement site	–	21.5	2006
7	Clackamas River at Milo McIver State Park near Estacada	14210005	21	2006
8	Clackamas River near Paradise Park	14210020	17.8	2006
9	Clackamas River above Bonnie Lure State Park near Paradise Park	14210025	16.9	2006
10	Clackamas River at Bonnie Lure State Park	14210030	16	2006
11	Eagle Creek at Bonnie Lure State Park	14210150	15.9 (a)	1992, 1998, 2006
12	Clackamas River near Eagle Creek	14210152	15.1	2006
13	Clackamas River at Barton Bridge at Barton	14210160	13.1	1992, 1998, 2006
14	Deep Creek near Barton	14210200	11.9 (a)	1992, 1998, 2006
15	Clackamas River above Foster Creek near Barton	14210480	11.3	2006
16	Foster Creek near Barton	14210490	10.9 (a)	2006
17	Clackamas River near Barton	14210500	9.6	2006
18	Richardson Creek at Highway 224 near Carver	14210530	8.9	2006
19	Clackamas River above Clear Creek near Carver	14210535	8.4	2006
20	Clear Creek at Carver	14210750	7.9 (a)	1992, 1998, 2006
21	Clackamas River below Clear Creek at Carver	14210760	7.8	1998
22	Clackamas River above Rock Creek near Carver	14210765	6.8	2006
23	Rock Creek near Carver	14210850	6.4 (a)	2006
24	Sieben Creek at Highway 224	14210900	6.0 (a)	2006
25	Clackamas River near Clackamas—streamflow monitoring site	14211000	4.8	1963–83, 1987, 2001, 2006
26	Carli Creek upstream from mouth near Clackamas	14211004	3.7 (a)	2006
27	Withdrawal	–	3.3 (a)	2001–06
28	Clackamas River near Oregon City (14211010)—streamflow measurement site	–	3.1	2006
29	Withdrawal	–	2.6 (a)	2001–06
30	Cow Creek at mouth near Gladstone	14211008	2.5 (a)	2006
31	Withdrawal	–	1.6 (a)	2001–06
32	Clackamas River near Oregon City—streamflow monitoring site	14211010	1.6	2001–06
33	Clackamas River at 99E bridge at Oregon City	452223122360100	0.3	1998